Information regarding installing hoses, inspecting hoses prior to installation and service life factors can be found in this LC San Hose Install and Glossary.

Contact 800-826-8302 to shop hoses.

Prior to Installation

  1. Examine the hose for any obvious damage. IF THE HOSE IS DAMAGED, DO NOT USE. Examples of damage may include slices to the cover, kinks, broken braid, and crushing of the hose (can reduce life and pressure rating).
  2. Review application to ensure proper selection of hose has been made by examining materials, pressures, chemical compatibility, temperature and B environment.
  3. Hose movement should be restricted to a SINGLE PLANE (Drawing A) to minimize the resultant twisting (torque). Note: The flexing plane should also be the plane in which the bending occurs. Excessive bending will induce stress fatigue (Drawing B).
  4. Axial movement should be eliminated. The hose should not be stretched or compressed along its longitudinal axis when installed in-line (Drawing C).
LCSanHose_Install_1aLCSanHose_Install_2a

 

Installation

  • Never use hose below minimum bend radius (Drawing D). Bend radii (measured to inside radius of fluoropolymer-lined hose and centerline for stainless steel metal hose) are given for individual products and sizes (consult factory for specific data). These values represent the minimum bend radius with which the hose can be properly installed. If these values are not maintained, the hose can fail prematurely. Note: In some cases, vacuum and pressure ratings are based on not exceeding 2% E minimum bend radius (consult factory for specific hose ratings).
  • Do not allow severe bends (Drawing E). Severe bends can cause kinking in a hose or overstress the assembly/material, resulting in damage and ultimate failure. If severe bends cannot be avoided, use elbows designed to accommodate the direction change.
  • Do not twist (torque) assembly along centerline during installation. The likelihood of leakage/failure increases for hoses that are twisted (torqued) during assembly. The proper use of floating flanges and swivel-type fittings (i.e., JIC) can eliminate improper twisting.
LCSanHose_Install_3a
  • For accurate tightening a torque wrench is HIGHLY recommended. If a flange leak occurs on one side of a properly torqued flange, the bolts should not be over-torqued. Instead loosen the bolts on the non-leaking side the same amount you tighten the bolts on the leaking side.

Service Life Factors

The actual service life of the hose assembly is strongly affected by its environment. Some of the factors that may influence service life include:

Corrosion Fatigue (including) Movement of attached equipment
General corrosion attack
Stress corrosion cracking
Intergranular corrosion
Pitting corrosion
High cyclic
Flexure
Pulsation
Torsion
Vibration Wear
Proper hose configuration and live
length should be used when hose may
be exposed to movements from
attached piping, tanks or equipment (i.e.,
thermal growth of mechanically imposed)
and/or offset.

 

 

 

 

 

 

Notice: Due to our continuous efforts to improve our products, the information contained in this section is subject to change without notice. Saint-gobain Performance Plastics assumes no obligations or liability for any advice furnished by it, or for results obtained with respect to these products. All such advice is given and accepted at the buyers risk. Final determination of suitability of any information or product for the use to be contemplated is the sole responsibility of the user. This section contains proprietary information, which is protected by copyright and may not be reproduced in any form without written consent of Saint-gobain Performance Plastics.

Please see the Hose Flexibility Glossary for detailed definitions.